Antoine Pitrou <pit...@free.fr> added the comment:

The problem is that queues and other synchronization objects can end up in an 
inconsistent state when a worker crashes, hangs or gets killed.
That's why, in concurrent.futures, a crashed worker makes the 
ProcessPoolExecutor become "broken". A similar thing should be done for 
multiprocessing.Pool but it's a more complex object.

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nosy: +neologix, pitrou

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14148>
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